Two things: anti-spam and per-process *network* I/O.

[Kevin D. Clark]

Ken D'Ambrosio writes:

> Per-process I/O accounting.  Every now and then, I see a system load 
> spike through the roof -- but disk I/O is okay, likewise CPU.  Which 
> really pretty much leaves network.  But I'm unaware of any tool that 
> spits out per-process network utilization statistics.  One *must* exist, 
> right?  Any pointers?

So, to confirm, when these incidents occur, the load average on the
machine is low?

I'd suggest using ntop and if things aren't clear from just this, using
some combination of "lsof -i ..." or "netstat -p".

Regards,

--kevin
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